Hong Kong Applied Science and Technology Research Institute Company, Limited

Shaohua Zhao

Wuxue Ni

Li Li

Pan Zhengang

Huang Yuanliang

Biqiang Luo

Xiaoshuo Chen

Systems and methods which provide training sequence or preamble-based synchronization with respect to non-coherent modulated signals and/or differentially coherent modulated signals are described. Embodiments provide for time synchronization using a technique for mitigating the effect of carrier frequency offset (CFO) with respect to the received signal. Embodiments of the present invention provide for frequency synchronization using a technique for estimating CFO using a constant bias induced with respect to the received signal by CFO. Additionally or alternatively, embodiments of the present invention provide for frequency synchronization using a technique for estimating CFO using phase rotation caused by CFO. The time synchronization and frequency synchronization of embodiments may be performed independently, without requiring the results of one synchronization operation for performing the other synchronization operation.

Systems and methods for frequency synchronization between transmitters and receivers in a communication system

Systems and methods for time synchronization between transmitters and receivers in a communication system

A method for packing data over a power line communication channel is disclosed herein. The method comprises packing data into symbol body, adding a first pad in front of the symbol body to form a full symbol and determining the time instance in which the peak absolute voltage point of the AC electric power occurs. And subsequently it is to send the full symbol through the power line in a manner synchronized with the time instance aforesaid. Based on the interference condition detection, the invention allows receiver side adaptation.

OFDM symbol structure for power line communication

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Hong Kong, China

Shaohua Zhao